./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8e4dbe5a9ab518912f1108432d43f490ec977d7 ........................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8e4dbe5a9ab518912f1108432d43f490ec977d7 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 16:55:27,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:55:27,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:55:27,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:55:27,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:55:27,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:55:27,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:55:27,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:55:27,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:55:27,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:55:27,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:55:27,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:55:27,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:55:27,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:55:27,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:55:27,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:55:27,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:55:27,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:55:27,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:55:27,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:55:27,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:55:27,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:55:27,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:55:27,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:55:27,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:55:27,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:55:27,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:55:27,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:55:27,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:55:27,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:55:27,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:55:27,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:55:27,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:55:27,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:55:27,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:55:27,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:55:27,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:55:27,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:55:27,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:55:27,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:55:27,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:55:27,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:55:27,981 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:55:27,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:55:27,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:55:27,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:55:27,983 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:55:27,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:55:27,983 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:55:27,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:55:27,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:55:27,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:55:27,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:55:27,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:55:27,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:55:27,985 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:55:27,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:55:27,985 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:55:27,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:55:27,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:55:27,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:55:27,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:55:27,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:55:27,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:55:27,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:55:27,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:55:27,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:55:27,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:55:27,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:55:27,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:55:27,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:55:27,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-11-28 16:55:28,313 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:55:28,332 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:55:28,335 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:55:28,337 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:55:28,338 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:55:28,339 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-28 16:55:28,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83da8d149/90b6a3775d474784850016bd0eb883ba/FLAGf18df8e85 [2019-11-28 16:55:28,932 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:55:28,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-28 16:55:28,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83da8d149/90b6a3775d474784850016bd0eb883ba/FLAGf18df8e85 [2019-11-28 16:55:29,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83da8d149/90b6a3775d474784850016bd0eb883ba [2019-11-28 16:55:29,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:55:29,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:55:29,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:55:29,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:55:29,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:55:29,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@212f942a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29, skipping insertion in model container [2019-11-28 16:55:29,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:55:29,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:55:29,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:55:29,576 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:55:29,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:55:29,693 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:55:29,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29 WrapperNode [2019-11-28 16:55:29,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:55:29,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:55:29,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:55:29,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:55:29,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:55:29,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:55:29,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:55:29,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:55:29,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... [2019-11-28 16:55:29,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:55:29,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:55:29,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:55:29,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:55:29,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:55:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 16:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-11-28 16:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:55:29,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:55:29,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:55:30,164 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:55:30,164 INFO L287 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-28 16:55:30,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:30 BoogieIcfgContainer [2019-11-28 16:55:30,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:55:30,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:55:30,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:55:30,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:55:30,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:55:29" (1/3) ... [2019-11-28 16:55:30,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a1c4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:55:30, skipping insertion in model container [2019-11-28 16:55:30,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:29" (2/3) ... [2019-11-28 16:55:30,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27a1c4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:55:30, skipping insertion in model container [2019-11-28 16:55:30,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:30" (3/3) ... [2019-11-28 16:55:30,176 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-11-28 16:55:30,192 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:55:30,204 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:55:30,223 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:55:30,255 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:55:30,255 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:55:30,255 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:55:30,255 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:55:30,256 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:55:30,256 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:55:30,256 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:55:30,256 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:55:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-28 16:55:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 16:55:30,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:30,293 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:30,294 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:30,306 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-28 16:55:30,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:55:30,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481928649] [2019-11-28 16:55:30,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:55:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:30,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481928649] [2019-11-28 16:55:30,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:30,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:55:30,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358039210] [2019-11-28 16:55:30,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:55:30,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:55:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:55:30,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:55:30,461 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-28 16:55:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:30,484 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-28 16:55:30,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:55:30,486 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-28 16:55:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:30,496 INFO L225 Difference]: With dead ends: 62 [2019-11-28 16:55:30,497 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 16:55:30,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:55:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 16:55:30,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 16:55:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 16:55:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-28 16:55:30,536 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-28 16:55:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:30,536 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-28 16:55:30,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:55:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-28 16:55:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 16:55:30,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:30,537 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:30,538 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-28 16:55:30,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:55:30,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396522102] [2019-11-28 16:55:30,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:55:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:30,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396522102] [2019-11-28 16:55:30,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:30,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 16:55:30,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747291120] [2019-11-28 16:55:30,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 16:55:30,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:55:30,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 16:55:30,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:55:30,619 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-11-28 16:55:30,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:30,699 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-28 16:55:30,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 16:55:30,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-28 16:55:30,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:30,701 INFO L225 Difference]: With dead ends: 53 [2019-11-28 16:55:30,701 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 16:55:30,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:55:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 16:55:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-28 16:55:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 16:55:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-28 16:55:30,710 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-28 16:55:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:30,710 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-28 16:55:30,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 16:55:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-28 16:55:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 16:55:30,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:30,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:30,712 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-11-28 16:55:30,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:55:30,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389462769] [2019-11-28 16:55:30,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:55:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:30,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389462769] [2019-11-28 16:55:30,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:30,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 16:55:30,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009737253] [2019-11-28 16:55:30,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 16:55:30,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:55:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 16:55:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:55:30,801 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-28 16:55:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:30,857 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-28 16:55:30,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 16:55:30,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-28 16:55:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:30,859 INFO L225 Difference]: With dead ends: 55 [2019-11-28 16:55:30,859 INFO L226 Difference]: Without dead ends: 46 [2019-11-28 16:55:30,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:55:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-28 16:55:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-11-28 16:55:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 16:55:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-28 16:55:30,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-11-28 16:55:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:30,867 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-28 16:55:30,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 16:55:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-28 16:55:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 16:55:30,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:30,868 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:30,869 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-28 16:55:30,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:55:30,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065847463] [2019-11-28 16:55:30,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:55:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:55:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:55:30,936 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:55:30,936 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:55:30,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:55:30 BoogieIcfgContainer [2019-11-28 16:55:30,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:55:30,966 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:55:30,966 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:55:30,966 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:55:30,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:30" (3/4) ... [2019-11-28 16:55:30,970 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 16:55:30,970 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:55:30,972 INFO L168 Benchmark]: Toolchain (without parser) took 1642.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 961.7 MB in the beginning and 1.0 GB in the end (delta: -85.4 MB). Peak memory consumption was 45.1 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:30,973 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:55:30,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -158.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:30,975 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:55:30,976 INFO L168 Benchmark]: Boogie Preprocessor took 31.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:55:30,977 INFO L168 Benchmark]: RCFGBuilder took 395.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:30,978 INFO L168 Benchmark]: TraceAbstraction took 797.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:30,978 INFO L168 Benchmark]: Witness Printer took 4.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:55:30,982 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 359.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -158.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.06 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 395.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 797.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 79]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 78, overapproximation of someUnaryFLOAToperation at line 74. Possible FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L31-L32] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L34-L35] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L37] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L40] return 0; [L44] COND TRUE __fpclassify_float(x) == 0 [L45] return y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 32 SDslu, 140 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-11-28 16:55:33,091 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-28 16:55:33,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:55:33,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:55:33,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:55:33,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:55:33,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:55:33,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:55:33,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:55:33,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:55:33,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:55:33,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:55:33,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:55:33,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-28 16:55:33,201 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:55:33,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:55:33,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:55:33,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:55:33,205 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:55:33,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:55:33,206 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:55:33,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:55:33,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:55:33,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:55:33,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:55:33,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:55:33,208 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-28 16:55:33,209 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-28 16:55:33,209 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:55:33,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:55:33,210 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:55:33,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:55:33,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:55:33,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:55:33,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:55:33,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:55:33,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:55:33,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:55:33,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:55:33,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:55:33,213 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-28 16:55:33,213 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-28 16:55:33,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:55:33,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:55:33,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-28 16:55:33,214 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8e4dbe5a9ab518912f1108432d43f490ec977d7 [2019-11-28 16:55:33,544 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:55:33,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:55:33,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:55:33,566 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:55:33,567 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:55:33,568 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-28 16:55:33,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb446c990/f644466860744b30a5697179abb9888d/FLAGd5bf1a597 [2019-11-28 16:55:34,079 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:55:34,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2019-11-28 16:55:34,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb446c990/f644466860744b30a5697179abb9888d/FLAGd5bf1a597 [2019-11-28 16:55:34,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb446c990/f644466860744b30a5697179abb9888d [2019-11-28 16:55:34,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:55:34,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:55:34,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:55:34,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:55:34,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:55:34,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3788b2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34, skipping insertion in model container [2019-11-28 16:55:34,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:55:34,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:55:34,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:55:34,742 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:55:34,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:55:34,881 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:55:34,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34 WrapperNode [2019-11-28 16:55:34,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:55:34,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:55:34,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:55:34,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:55:34,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:55:34,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:55:34,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:55:34,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:55:34,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... [2019-11-28 16:55:34,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:55:34,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:55:34,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:55:34,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:55:34,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:55:35,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 16:55:35,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-28 16:55:35,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:55:35,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:55:35,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2019-11-28 16:55:35,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:55:35,444 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:55:35,444 INFO L287 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-28 16:55:35,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:35 BoogieIcfgContainer [2019-11-28 16:55:35,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:55:35,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:55:35,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:55:35,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:55:35,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:55:34" (1/3) ... [2019-11-28 16:55:35,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7262ab39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:55:35, skipping insertion in model container [2019-11-28 16:55:35,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:34" (2/3) ... [2019-11-28 16:55:35,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7262ab39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:55:35, skipping insertion in model container [2019-11-28 16:55:35,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:35" (3/3) ... [2019-11-28 16:55:35,465 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2019-11-28 16:55:35,475 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:55:35,482 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:55:35,492 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:55:35,517 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:55:35,517 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:55:35,518 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:55:35,518 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:55:35,518 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:55:35,518 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:55:35,519 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:55:35,519 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:55:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-28 16:55:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 16:55:35,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:35,541 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:35,541 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:35,546 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-28 16:55:35,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:35,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621452580] [2019-11-28 16:55:35,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:35,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-28 16:55:35,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:55:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:35,653 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:55:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:35,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621452580] [2019-11-28 16:55:35,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:35,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-28 16:55:35,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747517296] [2019-11-28 16:55:35,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:55:35,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:55:35,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:55:35,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:55:35,688 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-28 16:55:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:35,708 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-28 16:55:35,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:55:35,709 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-28 16:55:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:35,722 INFO L225 Difference]: With dead ends: 62 [2019-11-28 16:55:35,722 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 16:55:35,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:55:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 16:55:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 16:55:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 16:55:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-28 16:55:35,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-28 16:55:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:35,767 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-28 16:55:35,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:55:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-28 16:55:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 16:55:35,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:35,768 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:35,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-28 16:55:35,983 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-28 16:55:35,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:35,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174422503] [2019-11-28 16:55:35,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:36,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 16:55:36,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:55:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:36,090 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:55:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:36,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174422503] [2019-11-28 16:55:36,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:36,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-28 16:55:36,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175012424] [2019-11-28 16:55:36,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 16:55:36,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:55:36,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 16:55:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:55:36,131 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-11-28 16:55:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:36,243 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-28 16:55:36,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 16:55:36,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-28 16:55:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:36,246 INFO L225 Difference]: With dead ends: 68 [2019-11-28 16:55:36,246 INFO L226 Difference]: Without dead ends: 59 [2019-11-28 16:55:36,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-28 16:55:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-28 16:55:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-11-28 16:55:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 16:55:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-28 16:55:36,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-28 16:55:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:36,257 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-28 16:55:36,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 16:55:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-28 16:55:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 16:55:36,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:36,258 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:36,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-28 16:55:36,480 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:36,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-28 16:55:36,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:36,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547051719] [2019-11-28 16:55:36,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:36,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 16:55:36,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:55:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:36,597 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:55:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:36,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547051719] [2019-11-28 16:55:36,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:36,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-28 16:55:36,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027892870] [2019-11-28 16:55:36,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 16:55:36,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:55:36,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 16:55:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:55:36,646 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-28 16:55:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:36,732 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-11-28 16:55:36,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 16:55:36,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-28 16:55:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:36,734 INFO L225 Difference]: With dead ends: 52 [2019-11-28 16:55:36,734 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 16:55:36,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:55:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 16:55:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 16:55:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 16:55:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-28 16:55:36,741 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-28 16:55:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:36,742 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-28 16:55:36,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 16:55:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-28 16:55:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 16:55:36,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:36,744 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:36,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-28 16:55:36,952 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-11-28 16:55:36,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:36,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735962524] [2019-11-28 16:55:36,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:37,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 16:55:37,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:55:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:37,034 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:55:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:37,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735962524] [2019-11-28 16:55:37,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:37,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-28 16:55:37,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533541891] [2019-11-28 16:55:37,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 16:55:37,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:55:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 16:55:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:55:37,058 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-11-28 16:55:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:37,151 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-28 16:55:37,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 16:55:37,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-28 16:55:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:37,155 INFO L225 Difference]: With dead ends: 61 [2019-11-28 16:55:37,155 INFO L226 Difference]: Without dead ends: 52 [2019-11-28 16:55:37,158 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-28 16:55:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-28 16:55:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-11-28 16:55:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 16:55:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-28 16:55:37,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-11-28 16:55:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:37,170 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-28 16:55:37,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 16:55:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-28 16:55:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 16:55:37,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:37,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:37,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-28 16:55:37,387 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-11-28 16:55:37,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:37,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482223372] [2019-11-28 16:55:37,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:37,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 16:55:37,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:55:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:37,479 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:55:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:37,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482223372] [2019-11-28 16:55:37,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:37,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-28 16:55:37,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033798868] [2019-11-28 16:55:37,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 16:55:37,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:55:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 16:55:37,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:55:37,503 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-28 16:55:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:37,525 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-11-28 16:55:37,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:55:37,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-28 16:55:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:37,528 INFO L225 Difference]: With dead ends: 38 [2019-11-28 16:55:37,528 INFO L226 Difference]: Without dead ends: 28 [2019-11-28 16:55:37,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:55:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-28 16:55:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-28 16:55:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 16:55:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-28 16:55:37,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-11-28 16:55:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:37,538 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-28 16:55:37,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 16:55:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-28 16:55:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 16:55:37,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:37,541 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:37,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-11-28 16:55:37,743 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-11-28 16:55:37,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:37,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892913676] [2019-11-28 16:55:37,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:37,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 16:55:37,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:55:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:37,880 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:55:37,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:55:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:37,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892913676] [2019-11-28 16:55:37,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:37,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-11-28 16:55:37,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998299142] [2019-11-28 16:55:37,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 16:55:37,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:55:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 16:55:37,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-28 16:55:37,942 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2019-11-28 16:55:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:38,059 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-11-28 16:55:38,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 16:55:38,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-11-28 16:55:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:38,060 INFO L225 Difference]: With dead ends: 40 [2019-11-28 16:55:38,061 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 16:55:38,061 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-28 16:55:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 16:55:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-28 16:55:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 16:55:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-28 16:55:38,066 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2019-11-28 16:55:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:38,067 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-28 16:55:38,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 16:55:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-28 16:55:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 16:55:38,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:38,068 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:38,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-11-28 16:55:38,269 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:38,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-11-28 16:55:38,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:38,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460773296] [2019-11-28 16:55:38,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:55:38,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 16:55:38,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:55:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:38,380 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:55:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:55:38,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460773296] [2019-11-28 16:55:38,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:55:38,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-28 16:55:38,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440487278] [2019-11-28 16:55:38,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:55:38,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:55:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:55:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:55:38,410 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-11-28 16:55:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:55:38,474 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-11-28 16:55:38,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:55:38,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-28 16:55:38,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:55:38,479 INFO L225 Difference]: With dead ends: 43 [2019-11-28 16:55:38,479 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 16:55:38,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:55:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 16:55:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 16:55:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 16:55:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-11-28 16:55:38,484 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2019-11-28 16:55:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:55:38,485 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-11-28 16:55:38,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:55:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-11-28 16:55:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 16:55:38,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:55:38,486 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:55:38,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-11-28 16:55:38,695 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:55:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:55:38,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-11-28 16:55:38,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:55:38,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963537265] [2019-11-28 16:55:38,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-11-28 16:55:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:55:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:55:38,943 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-28 16:55:38,943 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:55:39,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-11-28 16:55:39,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:55:39 BoogieIcfgContainer [2019-11-28 16:55:39,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:55:39,188 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:55:39,188 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:55:39,189 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:55:39,189 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:35" (3/4) ... [2019-11-28 16:55:39,192 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:55:39,264 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:55:39,264 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:55:39,267 INFO L168 Benchmark]: Toolchain (without parser) took 4775.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 956.3 MB in the beginning and 886.1 MB in the end (delta: 70.2 MB). Peak memory consumption was 191.9 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:39,267 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:55:39,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 956.3 MB in the beginning and 1.1 GB in the end (delta: -147.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:39,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:55:39,271 INFO L168 Benchmark]: Boogie Preprocessor took 38.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:55:39,272 INFO L168 Benchmark]: RCFGBuilder took 477.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:39,276 INFO L168 Benchmark]: TraceAbstraction took 3741.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 892.9 MB in the end (delta: 186.5 MB). Peak memory consumption was 186.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:39,277 INFO L168 Benchmark]: Witness Printer took 76.04 ms. Allocated memory is still 1.2 GB. Free memory was 892.9 MB in the beginning and 886.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-28 16:55:39,282 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 390.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 956.3 MB in the beginning and 1.1 GB in the end (delta: -147.9 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 47.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 477.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3741.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 892.9 MB in the end (delta: 186.5 MB). Peak memory consumption was 186.5 MB. Max. memory is 11.5 GB. * Witness Printer took 76.04 ms. Allocated memory is still 1.2 GB. Free memory was 892.9 MB in the beginning and 886.1 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 79]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L73] float x = 0.0f; [L74] float y = -0.0f; [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L44] COND FALSE !(__fpclassify_float(x) == 0) [L21] __uint32_t w; [L24] ieee_float_shape_type gf_u; [L25] gf_u.value = (x) [L26] EXPR gf_u.word [L26] (w) = gf_u.word [L29] COND TRUE w == 0x00000000 || w == 0x80000000 [L30] return 2; [L48] COND FALSE !(__fpclassify_float(y) == 0) [L51] EXPR x > y ? x : y [L51] return x > y ? x : y; [L75] float res = fmax_float(x, y); [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L55] __uint32_t w; [L58] ieee_float_shape_type gf_u; [L59] gf_u.value = (x) [L60] EXPR gf_u.word [L60] (w) = gf_u.word [L63] return (w & 0x80000000) != 0; [L78] EXPR res == 0.0f && __signbit_float(res) == 0 [L78] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L79] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.6s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 191 SDslu, 324 SDs, 0 SdLazy, 100 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7943 SizeOfPredicates, 27 NumberOfNonLiveVariables, 328 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...